The Multiquip 2021434 1/4" x 3/4" Dowel Pin is a genuine OEM component designed for MQ and STOW diaphragm pump models including MQ-D206H, MQ-D306HA, MQ-D305, D306, SDP-2, SDP-3, and CA90749. As a direct OEM replacement, this pin is manufactured to the exact dimensions required to maintain proper alignment and structural integrity within the pump assembly. Sourced directly through authorized Multiquip supply channels, it is the correct specification part for these diaphragm pump platforms. DHS Equipment stocks this part to support fast, accurate servicing of your equipment.
Key Features
- Exact OEM Dimensions — Manufactured to the precise 1/4" x 3/4" specification, ensuring correct seating and alignment within the pump housing without the need for fitting adjustments.
- Genuine Multiquip OEM Part — Produced to Multiquip's original material and dimensional standards, delivering the same hardness and shear resistance as the part it replaces.
- Broad Diaphragm Pump Compatibility — Fits MQ-D206H, MQ-D306HA, MQ-D305, D306, SDP-2, SDP-3, and CA90749 diaphragm pump models across both MQ and STOW product lines.
- Structural Alignment Performance — A correctly installed dowel pin keeps mating pump components properly indexed; a worn or missing pin can cause misalignment, accelerated wear, and pump assembly failures.
- Drop-In Replacement — Matches the original pin geometry for a straightforward swap during routine service or rebuild work on supported diaphragm pump models.
A dowel pin is a precision fastening component used to accurately locate and align two mating parts within an assembly. In a diaphragm pump, dowel pins maintain the correct positional relationship between housings, covers, or internal components, preventing lateral movement that could lead to seal failure or structural damage. When a dowel pin becomes worn, bent, or missing, component misalignment can occur rapidly, leading to accelerated wear on surrounding parts and compromised pump performance.
Part Details
| Part Number | 2021434 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | 1/4" x 3/4" Dowel Pin |
Compatibility & Fitment
| Name | Model |
|---|---|
| MQ Diaphragm Pumps | MQ-D206H |
| MQ Diaphragm Pumps | MQ-D306HA |
| STOW Diaphragm Pumps | SDP-2 |
| STOW Diaphragm Pumps | CA90749 |
| MQ Diaphragm Pumps | MQ-D305 |
| MQ Diaphragm Pumps | D306 |
| STOW Diaphragm Pumps | SDP-3 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
